t.Fatalf("no error should happened when alter column, but got %v", err)
	}

	if err := DB.Table("column_structs").AutoMigrate(&ColumnStruct2{}); err != nil {
		t.Fatalf("no error should happened when auto migrate column, but got %v", err)
	}

	if columnTypes, err := DB.Migrator().ColumnTypes(&ColumnStruct{}); err != nil {
		t.Fatalf("no error should returns for ColumnTypes")
	} else {

	if err := DB.Where(&user).First(&User{}).Error; err != nil {
		t.Errorf("search with struct with association should returns no error, but got %v", err)
	}

	if err := DB.Where(user).First(&User{}).Error; err != nil {
		t.Errorf("search with struct with association should returns no error, but got %v", err)
	}
}

func TestFindInBatches(t *testing.T) {
	users := []User{
		*GetUser("find_in_batches", Config{}),